Sounded implausible to me too. Perhaps its the number of videos currently being viewed such that e.g. viewing a 60 second video would effectively count for 60
This. Comparing "the amount of google searches conducted in the past minute" and "the number of Youtube videos playing during the past minute" is a bit meaningless because one is a (basically) instantaneous event and the other is a continuous event that generally lasts longer than a minute.
